Heating apparatus for vertically and helically conveying workpiece

ABSTRACT

The 2nd spiral supporting plate is spiraling vertically inside the mentioned cooling furnace; the direction of the mentioned conveyer belt inside the cooling furnace is uniform to that of the 2nd spiral supporting plate; drive mechanism for conveyer belt is installed on the mentioned main bracket. One or multiple gas inlet/inlets are set on the cooling furnace body to fill protective gas into furnace; the conveyer belt runs through the mentioned heating furnace and cooling furnace and forms one loop via drive mechanism. The protective atmosphere spiral conveying heating furnace and spiral conveying cooling device is energy-saving and space saving with high efficiency.

TECHNICAL FIELD

The invention belongs to the technical field of mechanical manufacture,of which heating apparatus for vertically and helically conveyingworkpiece is particularly involved.

BACKGROUND TECHNOLOGY

In the mechanical processing field, heat treatment process of coolingafter heating for workpiece drying, brazing stress relief annealing,artificial aging etc. shall be carried out. In present technology,horizontal type heating cooling device is usually used to heat and coolthe workpiece. With transversal arrangement and large area occupation ofthe conveyer belt, the energy is lost during continuous heating andcooling. In addition, the productivity of the enterprise is affected incase of limited space.

Invention Content

The technical problem to be solved by the invention is the presenttechnology deficiency as above mentioned, and to provide one type ofhighly effective and energy-saving protective atmosphere spiralconveying heating furnace and spiral conveying cooling device with smallequipment floor area.

In order to solve the above technical problem, the technical proposaladopted for this invention is heating apparatus for vertically andhelically conveying workpiece, including the main bracket, on whichinterconnected heating furnace and cooling furnace are arranged inparallel;

The bracket is placed inside the mentioned heating furnace, the 1^(st)spiral supporting plate is spiraling on the bracket, and conveyer beltis arranged on the 1^(st) spiral supporting plate along spiraldirection; one or multiple gas inlet/inlets are set on the heatingfurnace body to fill protective gas into furnace;

The 2^(nd) spiral supporting plate is spiraling vertically inside thementioned cooling furnace; the direction of the mentioned conveyer beltinside the cooling furnace is uniform to that of the 2^(nd) spiralsupporting plate; drive mechanism for conveyer belt is installed on thementioned main bracket. One or multiple gas inlet/inlets are set on thecooling furnace body to fill protective gas into furnace;

The conveyer belt runs through the mentioned heating furnace and coolingfurnace and forms one loop via drive mechanism.

The features and further improvement for the above technical proposal:

Further, the 2^(nd) spiral supporting plate is welded on the inner wallof cooling furnace;

In addition, the 1^(st) rotation unit is vertically placed insideheating furnace, which comprises the 1^(st) upper rotating shaft and the1^(st) lower rotating shaft, between which several vertical 1^(st)supporting bars are connected. The mentioned 1^(st) supporting bar isclosely against the inner side of the 1^(st) conveyer belt. The 1^(st)upper rotating shaft goes through top plate of heating furnace andinstalled outside the top plate via bearing. And the 1^(st) lowerrotating shaft goes through bottom plate of heating furnace andinstalled on the main bracket via bearing.

Furthermore, the 2^(nd) rotation unit is vertically placed inside thementioned cooling furnace, which comprises the 2^(nd) upper rotatingshaft and the 2^(nd) lower rotating shaft, between which severalvertical 2^(nd) supporting bars are connected. The mentioned 2^(nd)supporting bar is closely against the inner side of the 2^(nd) conveyerbelt. The 2^(nd) upper rotating shaft goes through top plate of coolingfurnace and installed outside the top plate via bearing. And the 2^(nd)lower rotating shaft goes through bottom plate of cooling furnace andinstalled on the main bracket via bearing.

The mentioned main bracket is equipped with the 1^(st) motor for drivingthe 1^(st) and the 2^(nd) rotation units.

Furthermore, the mentioned drive mechanism comprises many guidingrollers for guiding the conveyer belt and the 2^(nd) motor for drivingthe guiding rollers and putting the conveyer belt in motion.

The protective gas is one of the following gases: Hydrogen, Nitrogen,Ammonia decomposition gas (3H₂+N₂), DX gas, methyl alcohol & Nitrogen,Nitrogen & Hydrogen.

The invention is one type of protective atmosphere spiral conveyingheating furnace and spiral conveying cooling device with the followingadvantages: 1. High effective energy-saving with small floor area,unlimited to production site; 2. Productivity can be highly improvedwith same floor area and energy consumption; 3. Continuous production.

ATTACHED DRAWING DESCRIPTION

FIG. 1 Structural diagram of one type of protective atmosphere spiralconveying heating furnace and spiral conveying cooling device

In which: 1. Main bracket 2. Heating furnace 3. Cooling furnace 4.Bracket 5. 1^(st) spiral supporting plate 6. Conveyer belt 7. 2^(nd)spiral supporting plate 8. 1^(st) upper rotating shaft 9. 1^(st) lowerrotating shaft 10. 1^(st) supporting bar 11. 2^(nd) upper rotating shaft12. 2^(nd) lower rotating shaft 13. 2^(nd) supporting bar 14. 1^(st)motor; 15. Guiding roller 16. 2^(nd) motor 17. Gas inlet of heatingfurnace 18. Gas inlet of cooling furnace

DETAILED MODE OF EXECUTION

The invention is heating apparatus for vertically and helicallyconveying workpiece, as FIG. 1 shown, comprising main bracket (1), onwhich interconnecting heating furnace (2) and cooling furnace (3) areplaced in parallel. The bracket (4) is placed inside the heating furnace(2), the 1^(st) spiral supporting plate (5) is spiraling on the bracket(4), and conveyer belt (6) is arranged on the 1^(st) spiral supportingplate (5) along spiral direction; one or multiple gas inlet/inlets (17)are set on the heating furnace (2) body to fill protective gas intofurnace; The 2^(nd) spiral supporting plate (7) is spiraling verticallyinside the mentioned cooling furnace (3); the direction of the mentionedconveyer belt (6) inside the cooling furnace (3) is uniform to that ofthe 2^(nd) spiral supporting plate (7); drive mechanism for conveyerbelt is installed on the mentioned main bracket (1). One or multiple gasinlet/inlets (18) are set on the cooling furnace (3) body to fillprotective gas into furnace; the conveyer belt (6) runs through thementioned heating furnace (2) and cooling furnace (3) and forms one loopvia drive mechanism. The protective gas is used for protecting theworkpiece inside heating furnace (2) and cooling furnace (3). Theprotective gas is one of the gases: Hydrogen, Nitrogen, Ammoniadecomposition gas (3H₂+N₂), DX gas, methyl alcohol & Nitrogen, Nitrogen& Hydrogen. During practical production, the gas selection is subject toprocess requirement. The invention is heating apparatus for verticallyand helically conveying workpiece, which is used for normal heating,brazing heating or other heat treatment under protective atmosphere.

The invention is heating apparatus for vertically and helicallyconveying workpiece, the 2^(nd) spiral supporting plate (7) is welded onthe inner wall of cooling furnace. The 1^(st) rotation unit isvertically placed inside heating furnace (2), which comprises the 1^(st)upper rotating shaft (8) and the 1^(st) lower rotating shaft (9),between which several vertical 1^(st) supporting bars (10) areconnected. The mentioned 1^(st) supporting bar (10) is closely againstthe inner side of the 1^(st) conveyer belt. The 1^(st) upper rotatingshaft goes through top plate of heating furnace (2) and installedoutside the top plate via bearing. And the 1^(st) lower rotating shaftgoes through bottom plate of heating furnace (2) and installed on themain bracket (1) via bearing. The 2^(nd) rotation unit is verticallyplaced inside the mentioned cooling furnace, which comprises the 2^(nd)upper rotating shaft (11) and the 2^(nd) lower rotating shaft (12),between which several vertical 2^(nd) supporting bars (13) areconnected. The mentioned 2^(nd) supporting bar (13) is closely againstthe inner side of the 2^(nd) conveyer belt. The 2^(nd) upper rotatingshaft (11) goes through top plate of cooling furnace (3) and installedoutside the top plate via bearing. And the 2^(nd) lower rotating shaft(12) goes through bottom plate of cooling furnace (3) and installed onthe main bracket (1) via bearing. The main bracket (1) is equipped withthe 1^(st) motor (14) for driving the 1^(st) and the 2^(nd) rotationunits. The drive mechanism comprises many guiding rollers for guidingthe conveyer belt and the 2^(nd) motor (16) for driving the guidingrollers and putting the conveyer belt in motion.

The invention is heating apparatus for vertically and helicallyconveying workpiece, the 1^(st) spiral supporting plate (5) is placedinside heating furnace (2) for supporting and conveying conveyer belt(6). Longer conveying belt can be set in the same space inside heatingfurnace to ensure conveying more workpiece and improve productivity.Heating device is set on inner wall of heating furnace. The heatingfurnace volume with conveyer belt in same length is smaller, and sinceheating space is reduced, energy is thereby saved and heat efficiencyimproved. The 2^(nd) spiral supporting plate (7) is set in coolingfurnace (3) to save energy. During rotation of the 1^(st) supporting bar(10) and the 2^(nd) supporting bar (13), to provide friction power forconveyer belt (6) and reduce wearing to conveying belt to prolongservice life.

1. This device is one kind of vertical and helical conveyor, with thecharacter of conveying work piece helically in vertical direction, abovedevice installed inside the chamber of heating furnace (1), thisconveying device is used for transmitting the conveying belt (3) inhelical way, above mentioned device includes supporting device (2) forthis helical structure. Including the first rotor (9) as well, which isplaced in the room formed by first supporting structure (2) and rotatinground the vertical axis line. This rotor is cylindrical frame structure,the outer surface of rotor clings to the inner side of conveying belt(3), this rotor provides auxiliary power for the conveying belt which isrotating in the same direction.
 2. According to the rights claim 1, thecharacter of above mentioned helical and vertical conveying device is,the first supporting structure (2) are supporting plate, supportingroller or supporting belt.
 3. The character of above mentioned helicaland vertical conveying device is, including mentioned conveying devicein either rights claim 1, including heating furnace (1) as well,mentioned conveying device placed inside the chamber of heating furnace(1), conveying device drive belt (3), in the upper and bottom of furnacehas the first opening (5) and the second opening (6), opening (5) andopening (6) used for input and output of conveying belt (3). 4.According to the rights claim 3, the character of above mentionedhelical and vertical heating equipment is, outside the mentioned heatingfurnace (1) has work piece transmit system, the above mentioned workpiece transmit system includes conveying belt (3) and transmissionmechanism (4) used for driving the conveying belt, the conveying belt(3), enters into the heating furnace (1) according to the first opening(5), goes out from the second opening (6) of heating furnace. 5.According to the rights claim 3, the character of above mentionedhelical and vertical heating equipment is, conveying belt (3) goes outof heating furnace (1) via the second opening (6), back to the firstopening (5), form the first circulating loop for work piecetransmission.
 6. According to the rights claim 3, the character of abovementioned helical and vertical heating equipment is, including coolingfurnace (10) as well, cooling furnace (10) placed with heating furnace(1) in parallel, connected by conveying belt (3).
 7. According to therights claim 3, the character of above mentioned helical and verticalheating equipment is, cooling furnace (10) has the second supportingstructure (11) with helical type in vertical direction, the secondsupporting structure (11) has conveying belt (3) in the same directionwith helix, in the upper and bottom of cooling furnace has the thirdopening (12) and the fourth opening (13). The mentioned conveying belt(3) enters into the heating furnace (1) via the first opening (5), goesout from the second opening (6), enters into cooling furnace (10) viathe third opening (12), goes out of cooling furnace (10) via the fourthopening (13) and then goes back to the first opening (5), form thesecond circulating loop for work piece transmission.
 8. According to therights claim 7, the character of above mentioned helical and verticalheating equipment is, the mentioned second supporting structure (11) aresupporting plate, supporting roller or supporting belt, inside thecooling furnace, the second rotor (15) placed in the room which isformed by the second supporting structure (11), This rotor used forproviding auxiliary power for the conveying belt (3), The second rotor(15) is cylindrical frame structure, the outer surface of second rotor(15) adhere to the inner side of conveying belt (3), this second rotorprovides auxiliary power for the conveying belt.
 9. According to therights claim 3, the character of above mentioned helical and verticalheating equipment is, the mentioned first supporting structure (2) aremultiple, these supporting structures (2) set in parallel with interval.10. According to the rights claim 3, the character of above mentionedhelical and vertical heating equipment is, the quantity of firstsupporting structure (2) are 2 sets.
 11. According to the rights claim3, the character of above mentioned helical and vertical heatingequipment is, the first supporting structure (2) and the secondsupporting structure (11) are multiple, these multiple first supportstructure (2) and second supporting structure (11) are set in parallelwith interval respectively.
 12. According to the rights claim 3, thecharacter of above mentioned helical and vertical heating equipment is,the quantity of first supporting structure (2) and the second supportingstructure (11) are 2 sets both.
 13. According to the rights claim 3, thecharacter of above mentioned helical and vertical heating equipment is,heating furnace (1) body has one or several inlets (7) used for inlet ofair or atmosphere or other protective gases, the protective gas shouldbe one of the nitrogen, hydrogen, compound of H2 and N2, helium, Argongas, methanol dissociated gas, endothermic protective gas(AX gas),exothermic atmosphere(DX gas), ammonia dissociated gas.
 14. According tothe rights claim 3, the character of above mentioned helical andvertical heating equipment is, heating furnace (1) body has one orseveral inlets (7) used for inlet of protective gas, cooling furnace(10) has one or several inlets (14) used for inlet of protective gas oratmosphere, the protective gas should be one of the nitrogen, hydrogen,compound of H2 and N2, helium, Argon gas, methanol dissociated gas,endothermic gas(AX gas), exothermic protective gas(DX gas), ammoniadissociated gas.
 15. According to the rights claim 8, the character ofabove mentioned helical and vertical heating equipment is, the abovementioned first rotor and second rotor have 2 supporting rings (16) eachin the upper and bottom, the supporting rings (16) supported and fixedby several vertical brackets.
 16. According to the rights claim 15, thecharacter of above mentioned helical and vertical heating equipment is,center of each supporting ring (16) fixed with flange plate (17), 2flange plates (17) connected with bottom and upper of heating furnace(1) via the first rotating axle, or 2 flange plates (17) connected withbottom and upper of cooling furnace (10) via the second rotating axle, 2axles connected with rotor transmission mechanism (18). This rotortransmission mechanism used for driving the rotate of the first rotor(9)/the second rotor (15)
 17. According to the rights claim 3, thecharacter of above mentioned helical and vertical heating equipment is,the heating furnace (1) include furnace outer shell, thermal insulationlayer, heating element which is set inside the furnace inner wall. 18.According to the rights claim 3, the character of above mentionedhelical and vertical heating equipment is, the cooling furnace (10)includes outer shell, a refrigerant chamber is formed between shell andinner wall for coolant flowing.
 19. The character of above mentionedhelical and vertical conveying device is, including mentioned conveyingdevice in either rights claim 2, including heating furnace (1) as well,mentioned conveying device placed inside the chamber of heating furnace(1), conveying device drive belt (3), in the upper and bottom of furnacehas the first opening (5) and the second opening (6), opening (5) andopening (6) used for input and output of conveying belt (3).